Excavating-machine.



1. W. FAIHBANKS.

MACHINE.

APPLICATION FILED APII. 4, |914.

EXCAVATING 2 SHEETSQSHEET l- Inventor Attorneys Witnses QM uw I. W. FAIRBANKS.

EXCAVATING MACHINE.

APPLICATION FILED APR. 4. 1914.

l 2 SHEETS-SHEET 2.

Attorneys Inventor y JOHN W. FAIRBANKS, O MARION, OHIO.

nxcAvA'rrNG-MACHINE.

Mascia.

Specification of Letters Patent. Pattentd Jun@ 22, 1915.

Application led April 4, 1914. Serial No. 829,579.

T0 aZZ whom t may concern:

Be it known that I, JQHN W. FAIRBANKS, a citizen of the United States, residing at Marion, in the county of Marion and State of Ohio, have invented a new and useful Excavating-h/Iachine, of which the following is a specification.

This invention relates to excavating machines of thattype utilizing a scoop or dipper designed to `be thrust into the material being excavated, one of the objects of the invention being to provide a boom made up of tclescoping members, one of which supports a thrusting mechanism whereby the front member of the boom is projected forwardly thus to exert a thrusting action against the material being excavated by the scoop or dipper carried by the boom.

A further object is lto provide means whereby the scoop or dipper will be secured against swinging movement relative to the boom until a predetermined position has been reached by the boom whereupon the said scoop or dipper can be unlatched and its contents causedto be discharged.

A further object is to provide a machine of this character in which the boom is so mounted as to enable the scoop' to be thrust into the dirt, slate, shale, coal and the likel to beremoved, with much less power than heretofore necessary where the booms have been so mounted as to necessitate cutting downward by the buckets through the grain of the material to be excavated.

A further object is to provide a machine which will so operate, especially in digging coal, as to reduce the amountof waste, commonly called slack.

' As is well known, the usual method of excavating material is to utilize a dipper or scoop upon the .end of a boom extending along a radius intersecting the grain of the material to be excavated. Thus as the scoop or dipper is brought into action it is necessary `for it to cut downwardlythrough the grain of the said material, thus not only requiring greater power but tending to break up the material into fine particles of little value.

As hereinbefore pointed out, one of the objects of the present invention is to provide a machine the scoop or dipper of which is capable of being thrust longitudinally of the grain of the material to be excavated so that the tendency of breaking up the material is greatly reduced and less power is proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

ln said drawings z-Figure l is a side elevation of the machine, one of the positions of the boom and scoop being indicated by dotted lines. Fi 2 is an enlarged vertical longitudinal section through the scoop and the adjacent parts. Fig. 8 is an end elevation of the scoop.

Referring to the figures by characters of' reference, l designates a truck the wheels 9 of which may be designed to run either upoirL the ground or upon a track, this truck be'- ing propelled by any suitable mechanism, indicated generally at 3. A turntable 4 is departing mounted on the truck and supports a platform 5 on which a motor 6, a boiler 7, and

certain controlling mechanismindicated at 8' may be mounted.

vshe'ave 14,' and finally downwardly to the controlling mechanism 8. The sheave 14: is supported by an upstanding frame 15 suitably braced, as at.16. By means of the cable' 18 and its operating mechanism, the boom can be swung upwardly and downwardly.

rllhe member 9 of the boom carries a motor 17 designed to drive gearing 18, there being a gear 19 meshing with a rack 20 formed longitudinally upon the boom mem- -1 ber 10'so that, when the motor 17 is actuated,

4 wardly therefrom and pivotally mounted in thisyframe is a locking dog 25 having an arn 26 to which is secured the tripping cord 27 extending alon-g the boom 8 and over suitably arranged guide sheaves 28. A

spring 29 may be employed for holding the dog 25 normally in Ilocking position where' it will engagethe pin 23 when the scoop or dipper 21 is moved to active position. A controlling line 29 is secured to the upper end of arm 22 and passes over a guide sheave 30 carried by -frame 24 and also overl any other suitable arrangement of guide sheaves and thence downwardly tothe controlling mechanism 8. .i

It'is to be understood that the controlling mechanism 8l does not, specifically, constitute any part of the present invention. Various means may be provided for taking up and paying out the cable 13 and the line 29. It is merely essential that the mechanism be such as to enable the line 29.to be overhauled during the hoisting of the boom. It "is also desirable to use some form of brake mechanism whereby the paying out of the line 29 canl be retarded during the dumping operation so that the dumping can be effected without shock. Obviously various means can be provided for these purposes and consequently it has not been deemed necessary to go intoa detailed description and illustration thereof,- particularly in view of the fact that they do not in themselves constitute any part ofthe present invention.

In using the' machine herein described, the 'motor 17 is vput in operation so as to retract the boom section 10 and the arm 22 is shifted so as to cause dog 25 to engage pin 23 and thus lock .the scoop or dipper in active position. The boom is then lowered by means of the cable 13 and to the position indicated-by dotted lines in Fig. 1. The motor 17 is then operated to thrust the section 10 outwardlyfrom the section 9 so that the scoop or dipper will thus plow into the material to be excavated, the said scoop or dipper working into ythe material along the line of the grain thereof and as soon as it has been filled, the scoop or `dipper is raised by hoisting the boom 8 by means of cable 13. As before pointed out, during this hoisting of the boom, slack in the hne 29 will be taken up. After the boom has been elevated the desired distance, the same can be slued to one side and the tripping line 27 pulled so as to disengage dog 25 from vpin 23. The line 29 can then be paid out gradually so that the contents ofthe scoop or dipper will be discharged without jar to the machine. The parts can then be retracted as before and the operation repeated.

It has been found that by utilizing a machine operating in the manner set forth, the

.waste produced in excavating material such as coal, stone, etc., is reduced to the minimum and less power is required to thrust the scoop or dipper along lines parallel with the grain of the material than would be necessary to thrust it downwardly across the grain, as is necessary where the boom is extended along a radial. line intersecting the grainof the material.

What is claimed is An excavating machine including a boom, a scoop hingedly connected to the boom, a looped handleupstanding from the scoop, a cross pin carried thereby, a dog for engaging the in to lock the scoop against movement re ative to the boom, and means connected to the arm for retarding the movement of the scoop to discharging position relative to the boom, and means for actuating the dog to release the arm.

In testimony that I claim the foregoing as `my own, I havehereto aiixed my signature in the presence of two witnesses.

JOHN W. FAIRBANKS. Witnesses: JOHN A. BAYLE, C. F. LoMA'rcH. 

